JPH083910Y2 - Machine room exhaust structure of refrigerated showcase - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating showcase, and more particularly to a warm exhaust structure for use in preventing fog on the windshield of its display room.

[0002]

2. Description of the Related Art For example, a refrigerated showcase suitable for refrigerating and displaying fresh food such as sushi material in a sushi store is
The so-called “net case” is also called, but various new proposals have been made by the applicant of the present invention (Japanese Patent Application No. 1-51857, etc.). In the refrigerated showcase proposed by this proposal, the display room for refrigerating the displayed item, which is fresh food, has a double structure consisting of an inner box and an outer box surrounding the inner box. The inside of the inner box is cooled by the cold air circulating in the circulation passage.

A machine room disposed below the display room accommodates a cooler of a refrigeration circuit, a cooling fan, a refrigerant compressor, a condenser, a fan for a condenser, etc., and sends cooling air to the cold air circulation passage. And receive warm air. Further, although the inner box and the outer box of the display room each have a windshield due to its nature, warm exhaust after cooling the condenser is used to prevent fogging of the windshield of the outer box.

[0004]

As described above, the cooler, the cooling fan, the condenser, the fan for the condenser and the like are arranged in a plane in the machine room. Therefore, while the condenser and the fan for the condenser are disproportionately biased to one side, the windshield extends over the entire front surface, and therefore when the warm exhaust gas exiting the condenser is guided to the lower end portion of the windshield, The unevenness was inevitable, and the windshield was cloudy, resulting in a poor display effect. The present invention has been made for the purpose of preventing uneven mist removal of the windshield of the display room in such a refrigerated showcase.

[0005]

Means for Solving the Problems] was to achieve the above object
Therefore, according to the present invention, the upper display room and the lower machine room are
Are placed on top of each other and cool air from the cooler room of the machine room
Circulates to the outer circumference of the display room and
Refrigerated show that warm exhaust air blows along the outer surface of the glass
In that case, the machine room is insulated from the cooler room.
Upper compressor room and the lower condenser room
And a front buffer chamber in communication with the condenser chamber.
Compressor room at one longitudinal end of the refrigerated showcase
Through the outlet for the condenser fan.
-Condenser having a condensing pipe extending in the longitudinal direction of the case
It communicates with the room. The air passage that guides warm exhaust air is located in the front
Formed along the lower edge of the glass
It The front buffer compartment is located in the longitudinal direction of the refrigerated showcase.
It communicates with the condenser chamber on the other end side and substantially the entire front of the machine chamber.
It is defined over the entire area and
Through the flow distribution plate whose aperture ratio increases toward the end side,
The air passage is in contact.

[0006]

The air sent to the condenser chamber by the condenser fan cools the condenser and becomes warm exhaust gas and flows into the front buffer chamber. In the flow distribution plate of the front buffer chamber, for example, a plurality of circular holes are formed so that the opening ratio is small on the upstream side and large on the downstream side, so that the warm exhaust gas has a uniform longitudinal flow distribution. To the air passage. The warm exhaust gas that evenly flows out is finally blown out from below the windshield along the outer surface of the windshield to warm the windshield. If there are dew drops on the outer surface, they are evaporated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

FIG. 1 is a front perspective view of a refrigerating showcase according to this embodiment, and FIG. 2 is a rear perspective view thereof. Sign 1
This type of refrigerated showcase is generally used in sushi restaurants and the like for refrigerating and displaying fresh food such as sushi material, and is also called a "neta case." 1 and 2, a refrigerating showcase 1 includes an upper display room 2 and a lower refrigeration circuit machine room 3, and both side ends of the display room 2 are
Each is closed by a side cover 4. The power cord 5 and the ground wire 6 extend from the rear cover 8 of the machine room 3, and the tip of the drain pipe 7 also projects. Turn on the power supply used to control the refrigerating operation of the refrigerating showcase 1.
The off switch S is also attached to the rear cover 8, and a ventilation port 9 which is an intake port for cooling air described later is also provided.
A sliding door 11 used for putting in and out of refrigerated food is provided on the rear surface of the display room 2 and is divided by a center frame 10 in the center.

In FIG. 3 showing a vertical cross section taken along the line III-III of FIG. 1, the display room 2 includes an inner box A for storing fresh food, such as sushi material, to be displayed, and an outer box surrounding the inner box A. A cold air circulation passage C is formed between the two and B, and the details thereof will be described later. FIG. 4 shows IV- of FIG.
A vertical longitudinal section along line IV is shown. Referring to FIGS. 3 and 4, the inner box A includes a bottom plate 21, a pair of side plates 23 at both ends thereof, a horizontal top plate 25 extending in the longitudinal direction similarly to the bottom plate 21, an inner front windshield 26, and It is mainly composed of the sliding door 11 described above.

On the other hand, the outer box B includes a pair of side frames 2
7, a top frame 29 connecting these side frames 27, the side cover 4 described above, the top cover 31 at the top, the front multi-layer windshield 33, and the sliding door 1.
Although mainly composed of 1, the bottom surface side is formed with heat insulating structures 56a and 56b which serve as partition walls with a machine room 3 described later. As is clear from the above description, the rear surface side of the display room 2 is only the sliding door 11, and the sliding door 11 also serves as the rear surface of the inner box A and the rear surface of the outer box B.

The cold air circulation passage C is composed of a bottom outward passage 41, a side outward passage 43, a ceiling passage 45, a front passage 47 between the windshields 26 and 33, a side return passage 49 and a bottom return passage 51.

In particular, as is apparent from FIG. 4, the bottom plate 21
Is inclined so that the front surface side becomes lower, and the front and rear ends thereof are supported by the support members 35a and 35b, and the heat insulating structures 56a and 56a.
It is supported on b and defines a bottom outward path 41. Furthermore,
A heat insulating member 37 is attached to the lower surface of the bottom plate 21 so that a low temperature of the cool air immediately after being cooled is not transmitted to the inside of the inner box A. On the other hand, the top plate 25 that defines the ceiling passage 45 and the top frame 29 are connected by a fixing member 39, and the ceiling passage 45 and the front passage 47 communicate with each other through a narrow gap above the inner windshield 26.

Next, the structure of the machine room 3 will be described with reference to FIGS. 5 and 3 showing a horizontal cross section taken along the line VV of FIG. The machine room 3 is roughly divided into a cooler room 60 and a compressor room 80 directly below the display room 2, and a condenser room 100 and a front buffer room 110 (a warm exhaust room) below the cooler room 60. Cooler room 6
0 is located in the middle of the bottom outward path 41 and the bottom return path 51, and is defined by a heat insulating block 65 that is a box-shaped heat insulating structure that houses the cooling fan 61 and the cooler 63. The heat insulating block 65 is preferably made of an integrally molded product such as Styrofoam, and its mounting and fixing structure will be described later. Bottom plate 2
The heat insulating member 37 on the lower surface of No. 1 extends from above the bottom outward path 41 to above the cooler 63, and terminates immediately above its left end (in FIG. 3).

A cooling plate 67 made of a copper plate is sandwiched between the cooler 63 and the heat insulating member 37, and further extends into the bottom return path 51. The heat insulating member is formed on the lower surface of the bottom plate 21 in this portion. Since there is no 37, it directly contacts the lower surface of the bottom plate 21 and is bent at the boundary portion 67a. The cooler 63 includes a flexible tube 63a through which the refrigerant flows and end plates 63b on both sides.
And a plurality of fins sandwiched therebetween, the end plate 63b is a partition plate 71 that also functions as a support frame for the cooling fan 61 by the two wind direction plates 69a and 69b.
Is hermetically connected to. As a result, all the air flowing into the inlet plenum 73 of the cooler chamber 60 and passing through the cooling fan 61 is guided to the wind direction plates 69a and 69b and flows between the end plates 63b of the cooler 63.

An outlet guide 75 is also provided on the air outlet side of the cooler 63, and a main passage 77a extending toward the bottom outward passage 41 and an inversion passage 77 extending toward the bypass passage 79 on the air outlet side.
It is divided into b. That is, the outlet guide 75 is the closing plate 7
5a and the guide plate 7 extending to the bottom surface of the heat insulating block 65
5b, the cool air flowing along the inside of the end plate 63b of the cooler 63 is guided from the inversion passage 77b to the bypass passage 79. Closing plate 75a and guide plate 75b
The upper end of each of them is in close contact with the heat insulating member 37 on the lower surface of the bottom plate 21, and the main flow passage 77a and the reversing flow passage 77b are completely partitioned.

The bottom return path 51 is provided with a horizontal partition plate 52, which is divided into a lower main return path 51a and an upper auxiliary circulation path 54. FIG. 6 shows a horizontal cross section taken along line VI-VI in FIG. 3, but clearly shows that the auxiliary circulation passage 54 communicates with the bypass passage 79. The flow and action of the cooling air flowing through the cool air circulation passage C will be described with reference to FIGS. 6 and 3, and the cooling fan 61 will be described.
The air sucked in and flowing into the inlet plenum 73 flows through the cooling fan 61, is guided by the wind direction plates 69a and 69b, and flows through the fin portion of the cooler 63 (between the two end plates 63b). At this time, the heat of vaporization is taken by the refrigerant flowing through the flexible tube 63a to be cooled. The main flow of the cooled air passes through the main flow path 77 a on the air outlet side of the cooler 63 and flows out to the bottom outward path 41. This cold air flows through the bottom outward path 41 and flows into the side outward path 43, but is shielded by the heat insulating member 37, and the inside of the inner box A is not excessively cooled. Furthermore,
The cold air flows through the side outward path 43, splits, flows through the ceiling passage 45 and the front passage 47, and merges again in the side return path 49 to flow. While flowing through the side outward path 43, the ceiling passage 45, the front passage 47, and the side return path 49, the cool air cools the inside of the inner box A, and the temperature of the cool air rises and flows through the main return path 51a of the bottom return path 51. , Return to the entrance plenum 73.

On the air outlet side of the cooler 63, the reversal passage 77b is divided by the guide plate 75b of the outlet guide 75.
The sub-stream of the cool air that has flowed in flows through the bypass passage 79 between the end plate 63b and the partition wall of the cooler chamber 60, flows through the auxiliary circulation passage 54 on the horizontal partition plate 52, and from the lower surface of the bottom plate 21 to the inner box. Take away the heat inside A. The cooling plate 67 is a copper plate having a high thermal conductivity and is cooled by the cooler 63, so that the heat can be more effectively taken from the inside of the inner box A. Cooling plate 67
May be an aluminum plate, or a plate-shaped heat pipe can achieve the same effect.

Next, referring to FIG. 3 and FIG.
The structures of the compressor chamber 80, the condenser chamber 100, and the warm exhaust chamber 110 will be described with reference to FIG. 7 showing a vertical cross section taken along the line VII-VII.

The heat insulating structures 56a and 56b forming the bottom surface of the outer box B of the display room 2 are inclined so that the front surface side (left side in FIGS. 4 and 7) becomes lower like the bottom plate 21. A vertical support partition 81 extends from the vicinity thereof. The horizontal partition plate 83 having a hat-shaped cross section supports the lower end of the support partition wall 81 on the one hand and communicates with the rear cover 8 on the other hand, and the thermal insulation pad 65 made of ceramics.
The heat insulating block 65 is supported via a and 65b.
As described above, the heat insulating block 65 is made of Styrofoam, but also has heat insulating properties, and is supported by the ceramic heat insulating pads 65a and 65b having a high melting temperature and a high flash point to be separated from the horizontal partition plate 83, and the supporting partition 81 Since it is also away from, it is sufficiently protected from the heat of condensation described later.
As the material of the heat insulating pads 65a and 65b, wood, cork, heat resistant resin, etc. can be used. Horizontal partition plate 83
Extends over the entire machine chamber 3, but forms a recess 83a in the vicinity of the compressor 85. Compressor 8
5 is adjacent to the vent hole 9 of the rear cover 8 and has a bracket 87.
It is fixed on. The compressor 8 in the compressor room 80
A condenser fan 89 is supported on the front side of 5
It is supported and fixed by 1a and 91b. The shroud 93 protruding upward from the horizontal partition plate 83 is
Surrounding the wings of.

An inverted hat-shaped bottom plate 103 having an elastic rubber pad 101 attached to an appropriate place on the lower surface faces and is joined to the horizontal partition plate 83 to define a condenser chamber 100 between them. In the installation portion of the compressor 85, since the horizontal partition plate 83 forms the recess 83a, this portion does not form a substantial condenser chamber.

Except for this portion and below the fan 89, and substantially below the heat insulating block 65, a condensing pipe 105 is installed in a meandering manner on the lower surface of the horizontal partition plate 83 and the upper surface of the bottom plate 103, and a spacer. It is supported and fixed by 107. The condensing pipe 105 communicates with the refrigerant compressor 85 and the cooler 63 in terms of a refrigeration circuit, and a passage for cooling air is formed between the upper and lower condensing pipes 105.

As is apparent from FIGS. 4 and 7, the supporting partition 81 and the front vertical portion 83b of the horizontal partition plate 83.
And a front cover (flow distribution plate) 111 rising from the front flange portion of the bottom plate 103, the heat insulating structure 56a,
A warm exhaust chamber 110 that is defined in cooperation with the front end portion of 56b.
Extend in the longitudinal direction over substantially the entire length of the refrigerated showcase 1. The end of the condenser chamber 100 on the compressor side is closed, and an opening 113 is provided at the end of the condensing pipe 105. The opening 113 is further covered by a flow blocking plate 115 (see FIG. 3). There is. An opening 117 is formed in the upper end of the front cover 111, and communicates with an air passage 121 defined between the air guide 119 and the front ends of the heat insulating structures 56a and 56b. The aperture ratio of the opening 117 is
In FIG. 3, the amount of warm exhaust gas that becomes smaller toward the left side (that is, toward the upstream side) and flows out from the warm exhaust chamber 110 to the air passage 121 is evenly distributed in the longitudinal direction. On the front side vertical portion 83b of the horizontal partition plate 83,
A horizontal narrow opening, that is, a slot 83c is provided near the opening 113 (indicated by a chain double-dashed line in FIG. 3).
From here, the warm exhaust flows into the warm exhaust chamber 110.

Returning to FIG. 5, the compressor 85 and the fan 89.
Although the horizontal positional relationship is shown, the electrical equipment board 130 is provided with the heat insulating block 65 separated.

The flow of air during the refrigerating operation in the machine room 3 having the above-mentioned structure will be described. Although the flow inside the cooler chamber 60 has been described above, when the fan 89 is rotated, the air inside the compressor chamber 80 is sucked into it, so that the outside air flows in through the ventilation port 9 of the rear cover 8. That is, the external air flows in through the ventilation port 9, flows around the compressor 85, and cools the compressor 85 before reaching the fan 89.

The air that flows downward by the fan 89 and flows into the condenser chamber 100 flows between the condensing pipes 105 and removes heat from the refrigerant to condense it. A part of the air heated by depriving the heat of condensation, that is, the warm exhaust air, is opened 113
Flows out from the side. The remaining warm exhaust flows into the lower part of the warm exhaust chamber 110 through the opening 83c, passes through the opening 117 of the front cover 111, flows into the air passage 121, is guided by the air guide 119, and is guided by the windshield of the display room 2. It flows out along the outer surface of 33. The ratio of the opening 117 provided in the front cover 111, that is, the opening ratio is set as described above, and the warm exhaust air flows evenly on the outer surface of the windshield 33, so that the dew droplets that cause fog are appropriately removed. It
The above-described setting of the aperture ratio can be realized by changing the pitch along the longitudinal direction when the opening 117 is formed of a plurality of round holes, but the diameter of the round holes may be changed. Also, the opening 1
17 may be a plurality of square holes or elongated slots, which can be appropriately selected.

[0026]

As described above, according to the present invention, the compressor is
The warm exhaust air from the room is guided to the condenser room at one end of the refrigerated showcase.
Flow through the condenser chamber in the longitudinal direction, and then store in the refrigerator.
When it is made to flow into the front buffer chamber at the other end of the case,
The front buffer chamber in the longitudinal direction of the refrigerated showcase.
It communicates with the condenser chamber on the other end side and substantially the entire front of the machine chamber.
Defined over the area, and whether it is the other end of the refrigerated showcase
Through the flow distribution plate whose aperture ratio increases from one end to the other end
Since the front buffer chamber and the air passage are connected to each other, the air that has cooled the condenser and heated, that is, the warm exhaust gas, once flows into the front buffer chamber having a relatively large volume, and the longitudinal distribution of the flow rate is made by the flow distribution plate. Since it evenly flows into the air passage, there is no unevenness in the warm exhaust air blown out along the windshield, and the windshield can be evenly covered.

[Brief description of drawings]

FIG. 1 is a front perspective view of a refrigerated showcase according to an embodiment of the present invention.

FIG. 2 is a rear perspective view of the refrigerated showcase of FIG.

FIG. 3 is a vertical cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a vertical vertical sectional view taken along the line IV-IV of FIG.

5 is a horizontal cross-sectional view taken along the line VV of FIG.

6 is a horizontal cross-sectional view taken along the line VI-VI of FIG.

7 is a vertical vertical sectional view taken along the line VII-VII of FIG.

[Explanation of symbols]

1 Refrigeration Showcase 2 Display Room 3 Machine Room 26 Windshield 33 Windshield 60 Cooler Room 65 Insulation Block (Insulation Material) 80 Compressor Room 81 Support Partition 89 Fan (Condenser Fan) 100 Condenser Room 105 Condenser Pipe 110 Warm Exhaust chamber (front buffer chamber) 111 Front cover (flow distribution plate) 113 Opening 117 Opening 119 Air guide 121 Air passage

Claims (1)

[Scope of utility model registration request] 1. An upper display room and a lower machine room are arranged so as to overlap each other, and cool air from a cooler room of the machine room is provided.
In the refrigeration showcase in which warm exhaust air is blown out along the outer surface of the windshield of the display room while being circulated and supplied to the outer periphery of the display room, the machine room is insulated from the cooler room.
Upper compressor room blocked by material and condensation below
And a front buffer chamber communicating with the condenser chamber.
Including at one end side in the longitudinal direction of the refrigerated showcase
The compressor chamber has a discharge port for a condenser fan.
The condensation pie extending in the longitudinal direction of the refrigerated showcase.
An air passage that communicates with the condenser chamber having a pump and that guides the warm exhaust air is formed extending in the longitudinal direction along the lower edge of the windshield, and the front buffer chamber is
The other end of the refrigerated showcase in the longitudinal direction is connected to the condenser chamber.
It communicates with each other and is defined over substantially the entire front part of the machine room, and is directed from the other end side to the one end side of the refrigeration showcase.
A machine room exhaust structure for a refrigerating showcase, characterized in that the front buffer chamber and the air passage are connected via a flow distribution plate having an increased opening ratio .